2ljd

monophosphorylated (747pY) beta3 integrin cytoplasmic tail under membrane mimetic conditionsmonophosphorylated (747pY) beta3 integrin cytoplasmic tail under membrane mimetic conditions

Structural highlights 2ljd is a 1 chain structure with sequence from Homo sapiens. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Solution NMR, 15 models Ligands: Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Reversible protein phosphorylation is vital for many fundamental cellular processes. The actual impact of adding and removing phosphate group(s) is 3-fold: changes in the local/global geometry, alterations in the electrostatic potential and, as the result of both, modified protein-target interactions. Here we present a comprehensive structural investigation of the effects of phosphorylation on the conformational as well as functional states of a crucial cell surface receptor, alpha(IIb)beta(3) integrin. We have analyzed phosphorylated (Tyr(747) and Tyr(759)) beta(3) integrin cytoplasmic tail (CT) primarily by NMR, and our data demonstrate that under both aqueous and membrane-mimetic conditions, phosphorylation causes substantial conformational rearrangements. These changes originate from novel ionic interactions and revised phospholipid binding. Under aqueous conditions, the critical Tyr(747) phosphorylation prevents beta(3)CT from binding to its heterodimer partner alpha(IIb)CT, thus likely maintaining an activated state of the receptor. This conclusion was tested in vivo and confirmed by integrin-dependent endothelial cells adhesion assay. Under membrane-mimetic conditions, phosphorylation results in a modified membrane embedding characterized by significant changes in the secondary structure pattern and the overall fold of beta(3)CT. Collectively these data provide unique molecular insights into multiple regulatory roles of phosphorylation. Tyrosine phosphorylation as a conformational switch: a case study of integrin beta3 cytoplasmic tail.,Deshmukh L, Meller N, Alder N, Byzova T, Vinogradova O J Biol Chem. 2011 Nov 25;286(47):40943-53. doi: 10.1074/jbc.M111.231951. Epub, 2011 Sep 28. PMID:21956114 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Integrin 3D structures

spinqualitylabelsall models 2ljd Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image